Control flushing cooling system for planetary reducer

Abstract

The control flushing and cooling system comprises an oil tank assembly, a control valve assembly and an executing mechanism assembly, an oil tank in the oil tank assembly supplies oil to the control valve assembly through an oil supply pipeline to control the executing mechanism assembly to act, and the oil tank is connected back to the oil tank through an oil return pipeline; the control valve assembly comprises a first electromagnetic directional valve and a second electromagnetic directional valve, an overflow valve is connected between the oil supply pipeline and the oil return pipeline in a bridging mode, a third electromagnetic directional valve is connected between the overflow valve and the oil return pipeline, and the executing mechanism assembly comprises a brake oil cylinder, a clutch oil cylinder and a plurality of sets of planetary reducers. The oil supply pipeline flushes and cools the interior of the planetary reducer through the flushing pipeline and is connected back to the oil tank through the flushing oil return pipeline and the oil return pipeline. The hydraulic system has the advantages that the structure is reasonable, a hydraulic system and a lubricating system are combined into a whole, the arrangement space can be saved, the whole system takes hydraulic oil as a working medium, and the cost can be saved.

Description

Technical Field

[0001] The invention relates to the technical field of hydraulic control, in particular to a control flushing cooling system for a planetary reducer. Background Art

[0002] Usually, a complete planetary reducer system includes an actuator and a transmission mechanism. Among them, an independent hydraulic system is required to drive the actuator to move. The hydraulic system includes power components, control components, actuator components and their pipeline accessories, etc.; an independent lubrication system is also required to flush and cool the transmission mechanism to maintain a normal working environment. The lubrication system includes power components, control components and pipeline accessories, etc.

[0003] In the existing planetary reducer, the action of its actuator (brake, clutch) needs to be controlled by a hydraulic system, with hydraulic oil as the working medium; while the circulating flushing and cooling of the internal parts of the planetary reducer belong to the lubrication system, with lubricating oil as the working medium.

[0004] The hydraulic system and the lubrication system are independent of each other and interfere with each other, which not only takes up a large space but also greatly increases the cost. Summary of the invention

[0005] The purpose of the present invention is to make up for the above-mentioned deficiencies and to disclose to the public a control flushing cooling system for a planetary reducer which has a reasonable structure, saves layout space and saves costs.

[0006] The technical solution of the present invention is achieved in this way: A control flushing cooling system for a planetary reducer includes an oil tank assembly, a control valve assembly and an actuator assembly, wherein the oil tank assembly includes an oil tank, the oil tank supplies oil to the control valve assembly through an oil supply pipeline to control the action of the actuator assembly, the control valve assembly is connected back to the oil tank through an oil return pipeline, and a hydraulic pump driven by a motor is arranged on the oil supply pipeline; The control valve assembly includes a first electromagnetic reversing valve and a second electromagnetic reversing valve, a relief valve is connected between the oil supply pipeline and the oil return pipeline, a first check valve is arranged on the oil supply pipeline, a second check valve is arranged on the oil return pipeline, and a third electromagnetic reversing valve is connected between the relief valve and the oil return pipeline; The actuator assembly includes a brake cylinder, a clutch cylinder and several sets of planetary reducers, wherein the brake cylinder controls the brake of the planetary reducer, and the clutch cylinder controls the clutch of the planetary reducer; The first electromagnetic reversing valve is connected to the brake cylinder, the second electromagnetic reversing valve is connected to the clutch cylinder, the oil supply pipeline is connected to the planetary reducer through the flushing pipeline to flush and cool the inside of the planetary reducer, and the hydraulic oil after flushing is returned to the oil tank through the flushing oil return pipeline.

[0007] The measures to further optimize this technical solution are: Furthermore, the oil supply pipeline is connected to an accumulator, and the accumulator is connected to a pressure sensor.

[0008] Furthermore, the flushing pipeline is connected to the corresponding planetary reducer through a throttle valve.

[0009] Furthermore, a high-pressure pipeline filter and a third one-way valve are provided on the oil supply pipeline, and an oil return filter is provided on the oil return pipeline.

[0010] Furthermore, a cooler is provided on the oil return pipeline.

[0011] Furthermore, the oil tank is provided with a liquid level meter, a liquid level controller, a temperature controller and an air filter.

[0012] Furthermore, the brake cylinder is connected to a first pressure gauge, the clutch cylinder is connected to a second pressure gauge, the flushing pipeline is provided with a third pressure gauge, the flushing oil return pipeline is provided with a fourth pressure gauge, and the oil supply pipeline is provided with a fifth pressure gauge.

[0013] Furthermore, the planetary reducer includes a housing, a transmission shaft is arranged in the housing, a first center wheel is mounted on the transmission shaft, a first planetary wheel is meshed with the first center wheel, an intermediate ring gear is externally meshed with the first planetary wheel, a clutch is arranged between the first center wheel and the intermediate ring gear, and a brake is arranged between the intermediate ring gear and the housing; the first planetary wheel is mounted on the first planetary carrier, the transmission shaft is connected to the first planetary carrier, a second center wheel is connected to the first planetary carrier, a second planetary wheel is meshed with the second center wheel, the second planetary wheel is externally meshed with an outer ring gear, the outer ring gear is rotatably connected to the housing, and the second planetary wheel is mounted on the second planetary carrier.

[0014] Furthermore, the housing is provided with an oil flushing inlet and an oil flushing outlet.

[0015] The advantages of the present invention compared with the prior art are: The control flushing and cooling system for a planetary reducer of the present invention has a reasonable structure. It combines a hydraulic system for controlling the action of actuator components and a lubrication system for flushing and cooling parts into one, which can save layout space. The entire system uses hydraulic oil as the working medium, which can save costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is the hydraulic principle diagram of the present invention; Figure 2 is a cross-sectional structural diagram of the planetary reducer of the present invention; Figure 3 It is a side view of the planetary reducer of the present invention.

[0017] The names of the reference numerals in the accompanying drawings of the present invention are: Fuel tank assembly 1, fuel tank 1.1, liquid level gauge 1.2, liquid level controller 1.3, temperature controller 1.4, return oil filter 1.5, air filter 1.6, hydraulic pump 1.7, motor 1.8, third one-way valve 1.9, fifth pressure gauge 1.10, high-pressure pipeline filter 1.11, cooler 1.12, control valve assembly 2, third electromagnetic reversing valve 2.1, overflow valve 2.2, second one-way valve 2.3, first one-way valve 2.4, first electromagnetic reversing valve 2.5, second electromagnetic reversing valve 2.6, pressure sensor 2.7, accumulator 2.8, second pressure gauge 2.9, first pressure gauge 2.10, actuator assembly 3, brake cylinder 3.1, clutch cylinder 3.2, planetary reducer 3.3, throttle valve 3.4, third pressure gauge 3.5, fourth pressure gauge 3.6; Planetary reducer 3.3: housing 3.3a, transmission shaft 3.3b, first center wheel 3.3c, first planetary wheel 3.3d, intermediate ring gear 3.3e, clutch 3.3f, brake 3.3g, first planetary carrier 3.3h, second center wheel 3.3i, second planetary wheel 3.3j, outer ring gear 3.3k, second planetary carrier 3.3l, flushing oil inlet 3.3m, flushing oil outlet 3.3n. DETAILED DESCRIPTION

[0018] The present invention is further described in detail below in conjunction with the accompanying drawings: The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are only examples, and those skilled in the art can think of other obvious variations. The basic principles of the present invention defined in the following description can be used for other embodiments, variations, improvements, equivalents, and other technical solutions that do not deviate from the spirit and scope of the present invention.

[0019] Those skilled in the art should understand that, in the disclosure of the present invention, the directions or positions indicated by the terms "longitudinal", "lateral", "up", "down", "left", "right", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. are based on the directions or positional relationships shown in the accompanying drawings, which are only simplified descriptions for the convenience of describing the present invention, and do not indicate or imply that the device or component referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the above terms should not be understood as limitations on the present invention.

[0020] It is to be understood that the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element may be one, while in another embodiment, the number of the element may be multiple, and the term "one" should not be understood as a limitation on the quantity.

[0021] like Figure 1 As shown, a control flushing cooling system for a planetary reducer includes an oil tank assembly 1, a control valve assembly 2 and an actuator assembly 3. The oil tank assembly 1 includes an oil tank 1.1. The oil tank 1.1 supplies oil to the control valve assembly 2 through an oil supply pipeline to control the actuator assembly 3 to operate. The control valve assembly 2 is connected back to the oil tank 1.1 through an oil return pipeline. A hydraulic pump 1.7 driven by a motor 1.8 is provided on the oil supply pipeline. The control valve assembly 2 includes a first electromagnetic reversing valve 2.5 and a second electromagnetic reversing valve 2.6, a relief valve 2.2 is connected between the oil supply pipeline and the oil return pipeline, a first check valve 2.4 is provided on the oil supply pipeline, a second check valve 2.3 is provided on the oil return pipeline, and a third electromagnetic reversing valve 2.1 is connected between the relief valve 2.2 and the oil return pipeline; The actuator assembly 3 includes a brake cylinder 3.1, a clutch cylinder 3.2 and a plurality of planetary reducers 3.3. The brake cylinder 3.1 controls the brake 3.3g of the planetary reducer 3.3, and the clutch cylinder 3.2 controls the clutch 3.3f of the planetary reducer 3.3. The first electromagnetic reversing valve 2.5 is connected to the brake cylinder 3.1, the second electromagnetic reversing valve 2.6 is connected to the clutch cylinder 3.2, the oil supply pipeline is connected to the planetary reducer 3.3 through the flushing pipeline to flush and cool the inside of the planetary reducer 3.3, and the hydraulic oil after flushing is returned to the oil tank 1.1 through the flushing oil return pipeline.

[0022] The oil supply pipeline is connected to an accumulator 2.8, and the accumulator 2.8 is connected to a pressure sensor 2.7.

[0023] The flushing pipeline is connected to the corresponding planetary reducer 3.3 through a throttle valve 3.4.

[0024] The oil supply pipeline is provided with a high-pressure pipeline filter 1.11 and a third non-return valve 1.9, and the oil return pipeline is provided with an oil return filter 1.5.

[0025] The oil return pipeline is provided with a cooler 1.12.

[0026] The oil tank 1.1 is provided with a liquid level meter 1.2, a liquid level controller 1.3, a temperature controller 1.4 and an air filter 1.6.

[0027] The brake cylinder 3.1 is connected to a first pressure gauge 2.10, the clutch cylinder 3.2 is connected to a second pressure gauge 2.9, the flushing pipeline is provided with a third pressure gauge 3.5, the flushing oil return pipeline is provided with a fourth pressure gauge 3.6, and the oil supply pipeline is provided with a fifth pressure gauge 1.10.

[0028] like Figure 2 and Figure 3 As shown, the planetary reducer 3.3 includes a housing 3.3a, a transmission shaft 3.3b is arranged in the housing 3.3a, a first central wheel 3.3c is mounted on the transmission shaft 3.3b, a first planetary wheel 3.3d is meshed on the first central wheel 3.3c, an intermediate gear ring 3.3e is meshed outside the first planetary wheel 3.3d, a clutch 3.3f is arranged between the first central wheel 3.3c and the intermediate gear ring 3.3e, and a clutch 3.3f is arranged between the intermediate gear ring 3.3e and the housing 3.3a. The first planetary gear 3.3d is mounted on the first planetary carrier 3.3h, the transmission shaft 3.3b is connected to the first planetary carrier 3.3h, the first planetary carrier 3.3h is connected with a second center wheel 3.3i, the second center wheel 3.3i is meshed with a second planetary gear 3.3j, the second planetary gear 3.3j is externally meshed with an outer gear ring 3.3k, the outer gear ring 3.3k is rotatably connected to the housing 3.3a, and the second planetary gear 3.3j is mounted on the second planetary carrier 3.3l.

[0029] The housing 3.3a is provided with a flushing oil inlet 3.3m and a flushing oil outlet 3.3n.

[0030] The working principle of the planetary reducer 3.3 of the present invention is: The planetary reducer 3.3 of the present invention has a clutch 3.3f disposed between the first center wheel 3.3c and the intermediate gear ring 3.3e, and a brake 3.3g disposed between the intermediate gear ring 3.3e and the housing 3.3a. By controlling the clutch 3.3f and the brake 3.3g, not only can the adjustment between the braking state and the free wheel state be achieved, but also the transmission ratio can be selected.

[0031] The first center wheel 3.3c, the first planetary wheel 3.3d, and the first planetary carrier 3.3h constitute a first-stage planetary transmission structure, and the second center wheel 3.3i, the second planetary wheel 3.3j, and the second planetary carrier 3.3l constitute a next-stage planetary transmission structure. During use, the transmission ratio is selected by controlling the clutch 3.3f and the brake 3.3g, and two transmission states with different transmission ratios can be formed. When the first-stage planetary transmission structure works, the first-stage planetary transmission structure and the next-stage planetary transmission structure work together to form one transmission ratio; when the first-stage planetary transmission structure does not work, only the next-stage planetary transmission structure works to form another transmission ratio.

[0032] The clutch 3.3f is a normally closed hydraulic clutch composed of a disc-type multi-friction plate, and the brake 3.3g is a normally closed hydraulic brake composed of a disc-type multi-friction plate.

[0033] When the brake 3.3g and the clutch 3.3f are not supplied with oil, the brake 3.3g and the clutch 3.3f are closed, the housing 3.3a, the intermediate gear ring 3.3e and the first center wheel 3.3c form a whole, and the planetary reducer 3.3 is in a braking state. When the brake 3.3g and the clutch 3.3f are supplied with oil, the first center wheel 3.3c and the intermediate gear ring 3.3e can rotate relative to each other, and the intermediate gear ring 3.3e and the housing 3.3a can also rotate relative to each other. At this time, the planetary reducer 3.3 is in a freewheel state. When the brake 3.3g is not supplied with oil and the clutch 3.3f is supplied with oil, that is, the brake 3.3g is not working and the clutch 3.3f is working, the first-stage planetary transmission structure works normally, the transmission shaft 3.3b drives the first center wheel 3.3c and the first planetary wheel 3.3d to move, and then the first planetary carrier 3.3h drives the second center wheel 3.3i and the second planetary wheel 3.3j to move, and finally drives the outer ring gear 3.3k to rotate, that is, the next-stage planetary transmission structure also works normally; at this time, the first-stage planetary transmission structure and the next-stage planetary transmission structure work at the same time, and the two work together to realize a transmission ratio. When the brake 3.3g is inflated with oil and the clutch 3.3f is not inflated with oil, that is, the brake 3.3g is working and the clutch 3.3f is not working, at this time, the first-stage planetary transmission structure does not work, and the transmission shaft 3.3b directly drives the second center wheel 3.3i and the second planetary wheel 3.3j to move through the first planetary carrier 3.3h, and finally drives the outer gear ring 3.3k to rotate. In this state, only the next-stage planetary transmission structure is in effect, thereby realizing another transmission ratio (i.e., the transmission ratio of the next-stage planetary transmission structure). That is to say, the planetary reducer 3.3 of the present invention can form the above four working states by controlling the operation of the brake 3.3g and the clutch 3.3f, and can select the transmission ratio by control.

[0034] Working principle: (1) During normal working hours, the motor pump group consisting of the motor 1.8 and the hydraulic pump 1.7 is used as a power source to supply oil to the control valve assembly 2 and control the action of the actuator assembly 3. The actuator assembly 3 includes a brake cylinder 3.1, a clutch cylinder 3.2 and a plurality of planetary reducers 3.3. The hydraulic system controls the action of the brake 3.3g of the planetary reducer 3.3 through the brake cylinder 3.1, and controls the action of the clutch 3.3f of the planetary reducer 3.3 through the clutch cylinder 3.2, and at the same time flushes and cools the internal parts of the planetary reducer 3.3.

[0035] (2) Brake cylinder operation: When the brake cylinder 3.1 needs to be actuated, the motor 1.8 starts, the third electromagnetic reversing valve 2.1 and the first electromagnetic reversing valve 2.5 are energized, and the working medium passes through the hydraulic pump 1.7, the third one-way valve 1.9, and the high-pressure pipeline filter 1.11, and after the pressure is adjusted by the overflow valve 2.2, it enters the brake cylinder 3.1 through the first one-way valve 2.4 and the first electromagnetic reversing valve 2.5. The working medium overcomes the spring force and makes the brake 3.3g of the planetary reducer 3.3 work. When the brake 3.3g does not need to work, due to the back pressure of the second one-way valve 2.3, after the first electromagnetic reversing valve 2.5 loses power, the working medium in the brake cylinder 3.1 can quickly pass through the first electromagnetic reversing valve 2.5 and the throttle valve 3.4 to enter the inner cavity of the planetary reducer 3.3, and its return oil returns to the oil tank 1.1 through the cooler 1.12 and the return oil filter 1.5.

[0036] (3) Clutch cylinder operation: When the clutch oil cylinder 3.2 needs to work, the motor 1.8 starts, the third electromagnetic reversing valve 2.1 and the second electromagnetic reversing valve 2.6 are energized, and the working medium passes through the hydraulic pump 1.7, the third one-way valve 1.9, and the high-pressure pipeline filter 1.11. After the pressure is adjusted by the overflow valve 2.2, it enters the clutch oil cylinder 3.2 through the first one-way valve 2.4 and the second electromagnetic reversing valve 2.6. The working medium overcomes the spring force and makes it work. When the clutch does not need to work, due to the back pressure of the second one-way valve 2.3, the second electromagnetic reversing valve 2.6 loses power, and the working medium in the clutch oil cylinder 3.2 can quickly pass through the second electromagnetic reversing valve 2.6 and the throttle valve 3.4 to enter the inner cavity of the planetary reducer 3.3, and its return oil returns to the oil tank 1.1 through the cooler 1.12 and the return oil filter 1.5.

[0037] (4) Flushing and cooling of planetary reducer: In addition to the return oil from the brake cylinder 3.1 and the clutch cylinder 3.2 going to the inner cavity of the planetary reducer 3.3 for flushing and cooling, during normal operation, due to the back pressure of the second check valve 2.3, after the third electromagnetic reversing valve 2.1 is energized, the overflow oil from the overflow valve 2.2 will also enter the inner cavity of the planetary reducer 3.3 for flushing and cooling. The throttle valve 3.4 can adjust the amount of oil entering the planetary reducer 3.3. If the oil return of the planetary reducer 3.3 is not smooth, the amount of oil entering the planetary reducer 3.3 can be appropriately reduced to prevent excessive internal medium.

[0038] (5) Accumulator operation: The inlet and outlet of the accumulator 2.8 are provided with a pressure sensor 2.7, which can monitor the pressure in the accumulator 2.8 at all times. If the pressure in the accumulator 2.8 is lower than the set value, the motor 1.8 and the third electromagnetic reversing valve 2.1 can be energized to replenish the accumulator 2.8 until the pressure in the accumulator 2.8 reaches the set value, and then the third electromagnetic reversing valve 2.1 and the motor 1.8 are de-energized in turn.

[0039] During normal operation, the accumulator 2.8 does not participate in the operation of the brake cylinder 3.1 and the clutch cylinder 3.2. It only plays an emergency role when the power system fails and the motor 1.8 cannot be started. In an emergency, the accumulator 2.8 can supply oil to the brake cylinder 3.1 and the clutch cylinder 3.2 to enable them to complete one or two actions.

[0040] The above are only preferred embodiments of the present invention, and are not intended to limit the implementation methods and protection scope of the present invention. Those skilled in the art should be aware that all solutions obtained by equivalent substitutions and obvious changes made using the description and illustrations of the present invention should be included in the protection scope of the present invention.

Claims

1. A control flushing cooling system for a planetary reducer, comprising an oil tank assembly (1), a control valve assembly (2) and an actuator assembly (3), wherein: The oil tank assembly (1) comprises an oil tank (1.1), the oil tank (1.1) supplies oil to the control valve assembly (2) through an oil supply pipeline to control the operation of the actuator assembly (3), the control valve assembly (2) is connected back to the oil tank (1.1) through an oil return pipeline, and a hydraulic pump (1.7) driven by a motor (1.8) is arranged on the oil supply pipeline; The control valve assembly (2) comprises a first electromagnetic reversing valve (2.5) and a second electromagnetic reversing valve (2.6); a relief valve (2.2) is bridged between the oil supply pipeline and the oil return pipeline; a first check valve (2.4) is arranged on the oil supply pipeline; a second check valve (2.3) is arranged on the oil return pipeline; and a third electromagnetic reversing valve (2.1) is connected between the relief valve (2.2) and the oil return pipeline; The actuator assembly (3) comprises a brake cylinder (3.1), a clutch cylinder (3.2) and a plurality of sets of planetary reducers (3.3); the brake cylinder (3.1) controls the brake (3.3g) of the planetary reducer (3.3), and the clutch cylinder (3.2) controls the clutch (3.3f) of the planetary reducer (3.3); The first electromagnetic reversing valve (2.5) is connected to the brake oil cylinder (3.1), the second electromagnetic reversing valve (2.6) is connected to the clutch oil cylinder (3.2), the oil supply pipeline is connected to the planetary reducer (3.3) through the flushing pipeline to flush and cool the inside of the planetary reducer (3.3), and the hydraulic oil after flushing is returned to the oil tank (1.1) through the flushing oil return pipeline.

2. A control flushing cooling system for a planetary reducer according to claim 1, characterized in that: The oil supply pipeline is connected to an accumulator (2.8), and the accumulator (2.8) is connected to a pressure sensor (2.7).

3. A control flushing cooling system for a planetary reducer according to claim 2, characterized in that: The flushing pipeline is connected to the corresponding planetary reducer (3.3) through a throttle valve (3.4).

4. A control flushing cooling system for a planetary reducer according to claim 3, characterized in that: The oil supply pipeline is provided with a high-pressure pipeline filter (1.11) and a third one-way valve (1.9), and the oil return pipeline is provided with an oil return filter (1.5).

5. A control flushing cooling system for a planetary reducer according to claim 4, characterized in that: A cooler (1.12) is arranged on the oil return pipeline.

6. A control flushing cooling system for a planetary reducer according to claim 5, characterized in that: The oil tank (1.1) is provided with a liquid level meter (1.2), a liquid level controller (1.3), a temperature controller (1.4) and an air filter (1.6).

7. A control flushing cooling system for a planetary reducer according to claim 6, characterized in that: The brake oil cylinder (3.1) is connected to a first pressure gauge (2.10), the clutch oil cylinder (3.2) is connected to a second pressure gauge (2.9), the flushing pipeline is provided with a third pressure gauge (3.5), the flushing oil return pipeline is provided with a fourth pressure gauge (3.6), and the oil supply pipeline is provided with a fifth pressure gauge (1.10).

8. A control flushing cooling system for a planetary reducer according to any one of claims 1 to 7, characterized in that: The planetary reducer (3.3) comprises a housing (3.3a), a transmission shaft (3.3b) is arranged in the housing (3.3a), a first central wheel (3.3c) is mounted on the transmission shaft (3.3b), a first planetary wheel (3.3d) is meshed with the first central wheel (3.3c), an intermediate gear ring (3.3e) is meshed with the first planetary wheel (3.3d), a clutch (3.3f) is arranged between the first central wheel (3.3c) and the intermediate gear ring (3.3e), and a brake (3.3f) is arranged between the intermediate gear ring (3.3e) and the housing (3.3a). device (3.3g); the first planetary gear (3.3d) is mounted on the first planetary carrier (3.3h); the transmission shaft (3.3b) and the first planetary carrier (3.3h); the first planetary carrier (3.3h) is connected with a second center gear (3.3i); the second center gear (3.3i) is meshed with a second planetary gear (3.3j); the second planetary gear (3.3j) is meshed with an outer gear ring (3.3k); the outer gear ring (3.3k) is rotatably connected to the housing (3.3a); the second planetary gear (3.3j) is mounted on the second planetary carrier (3.3l).

9. A control flushing cooling system for a planetary reducer according to claim 8, characterized in that: The housing (3.3a) is provided with a flushing oil inlet (3.3m) and a flushing oil outlet (3.3n).

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